Annandale is located in Hunterdon county New jersey with a geographic area of 1.5 square miles. The total population in Annandale is 1,794 with 45.0% male and 55.0% female. Children under age 5 represent 8.4% of the population, under age 18 equal 21.5% of the population and over age 65 is 12.8% of the population. The median household income is $113,984, per capita income is $45,262. There are a total of 575 housing units with 63.1% owner occupied. Education includes 10.8% of residents that are high school graduates and 63.5% with a bachelor's degree or higher. The average temperature in Annandale in the summer is 73 degrees, and in the winter 34 degrees.